Lol my daughter is also 6 with this very energetic behaviore... He is jus courious and learning new things. They love to talk at this age, I call my daughter "21questions" lol I think its harmless. If u start to notice that he is so zoned out hes unawear of his sorroundings then get him checked out I cold b wrong, but it dosent seem like a problem....
6 year olds do chatter a lot, and sometimes it can be irritating to adults , how much does he talk, some children ask a lot of questions I think that shows an enquiring mind ,He may need more exercise, make sure he gets out walking running, get Dad playing ball games with him .
Sorry, but what's "too much"? Do you mean he won't even stop if you ask him to?
Not still for a moment -- does he get any good amount of exercise? Maybe he's just not getting tired out enough.
If he talks nonstop and is hyper-moving and active all the time, talk to his doctor.